The Sunnyvale Department of Public Safety and the Santa Clara County District Attorney’s Office are conducting a joint investigation into the officer-involved shooting that occurred June 5 at 498 N. Fair Oaks Ave. The investigation follows county protocol.

Police shot and killed Glen Griggs, 53, who resided at the home with Molly Franquemont, who was reported missing in May 2013. An investigation led police to believe that she may have been the victim of a homicide.

DPS police and detectives served a search and arrest warrant June 5 and reported Griggs was unresponsive when they tried to communicate with him from outside the home. Sunnyvale SWAT also backed up detectives. They forced entry and found Griggs, the sole occupant, barricaded inside, and he told police he was armed with a gun.

Police retreated outside to the front of the home and continued trying to coerce him out. When Griggs began to emerge from the back of the home, officers saw that he was armed with what looked to be a gun.

Police reported he ignored their request to drop the weapon, and out of fear for their safety, shot and killed him. The weapon was later determined to be a long pellet gun.

Officers and paramedics at the scene did provide medical attention to Griggs, who was taken to Santa Clara Valley Medical Center, where he died from his injuries.

Traffic was impacted in the area near Fair Oaks and Maude avenues for several hours after the shooting. Several streets were closed, including southbound Fair Oaks at Wolfe Road, eastbound Maude at Worley Avenue, westbound Maude at Wolfe and northbound Fair Oaks at Columbia.

Columbia Middle School was initially put on a precautionary lockdown, which was lifted shortly after the incident.

The DPS investigation unit is continuing its criminal investigation into the case.

The incident marks the third officer-involved shooting in Sunnyvale in the past year. In August, Michael Nehez was shot by three officers as he rushed at them with a large kitchen knife. Nehez had called 911 and told dispatchers that he had killed his wife. Investigators found his 55-year-old wife, Marlene Nehez, stabbed to death in the home.

In September, agents with Santa Clara police and the county sheriff’s office shot and killed Juan Ruelas, 34, of Sunnyvale, during an undercover drug transaction in front of Hobee’s Restaurant.